Ratchet device for tools



N9 Mqdel.) 2 Sheets-Shet 1.

P. J-. OBRIEN. RATOHET DEVICE FOR TOOLS.

No. 501,957. Patented JuIyZB, 1893.

m0 Model.) 2 Sheets- Sheet 2. I

P. J. OBR'IEN. RATCHET DEVICE FOR TOOLS.

No. 501,957. Patented July 25 l UNITED STATES PATENT OFFICE.

PATRICK J. OBRIEN, CINCINNATI, OHIO.

RATCHET DEVICEFOR TOOLS.

SPECIFICATION forming part of Letter Patent No. 501,957, dated July 25,1893.

Serial No. 437,757. (No model.)

\ ton and State of Ohio, have invented certain new and usefulImprovements in Ratchet Devices for Tools; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake use the same.

My invention relates to an improvement in ratchet devices for tools,-theobject of the invention being to produce a simple and efficient ratchetdevice for tools, such as carpenters braces, pipe cutting devices,ratchet drills, screw jacks, &c., said ratchet device being soconstructed and arranged that the vibration of an operating lever willcause a continuous, uninterrupted rotation of the shaft which actuatesthe tool.

A further object is to produce a ratchet device for tools, by means ofwhich a continuous, uninterrupted rotation can be imparted to the tool,in either direction.

With these objects in view the invention consists in certain novelfeatures of construction and combinations and arrangements of parts ashereinafterset forth and pointed out in the claims.

In the accompanying drawings: Figure 1 is an elevation partly insection. Fig. 2 is a detail view. Fig. 3 is an elevation at right anglesto Fig. 1, partly in section.

A represents a horizontal shaft, provided at one end with a bevel pinion1, and at the other end with a ratchet wheel2.

Mounted loosely on the shaftA in proximity to the ratchet wheel 2, is abevel pinion 3, from which an integral ratchet wheel 4 projects, saidratchet wheel 4. being located in close proximity to the ratchet wheel 2secured to the shaft A,sufficient space being left between said ratchetwheels for the accommodation of an arm 5 which is mounted loosely on theshaft A. The arm 5 projects from an operating lever 6 on which a collar7 having depending flanges 7, is located. Projecting from the operatinglever 6 and parallel with the arm 5 of said lever, are ears 6*, betweenwhich and the arm 5, dogs 8, 9, are pivotally connected, and locatedbetween the upper ends of said dogs, are springs 9. Two dogs arearranged at each side of the arm 5 within the collar 7 and are adaptedto engage the ratchet wheels 2, 4, as hereinafter set forth. A bar orshaft 10 is mounted on the shaft A and is provided at its lower end withan annular groove a said lower end of the bar being adapted to enter acollar 1), projecting from the bevel gear 11, and revolubly vheld onsaid bar by means of screws 0, or in any other preferred manner,-thebevel gear 11 being adapted to mesh with the bevel gears 1 and 3. Ashank 12 projects from the center of the bevel pinion 11, into thesocket piece of the tool to be used and is held in place by means of aset screw 13. The bar 10 may be extended and provided at its top with ahandle 14, by means of which to operate it.

When the device is in operation, only one spring dog on each side of thearm 5, operates at a time. Thus when the operating lever 6 is pulledforward, one of the dogs 8 will engage the ratchet wheel 2, turn theshaft A and, through the pinions 1, 11, impart rotary motion to thetool. When the lever is forced back, one of the opposite dogs 9 willengage the ratchet wheel 4, and through the medium of the pinions 1, 3,11, continue the rotation of the tool in the same direction, said dogsbeing maintained in engagement with the ratchet wheels by the flanges 7of the collar 7. Now by turning the collar 7 one-fourth of a revolution,the dogs above referred to will be set free and the other pair of dogsmaintained in engagement withthe ratchet wheel. If the handle be nowoperated, the tool will be rotated in the reverse direction.

The device is very simple in construction and effectual in theperformance of its functions.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination with a shaft, of abevel pinion secured to one endthereof and a ratchet wheel secured to the other end, a bevel pinionmounted loosely on the shaft and carrying a ratchet wheel, anintermediate bevel pinion adapted to mesh with the above mentionedpinions,a lever mounted on said shaft between the ratchet wheels, twospring actu ated dogs carried by said lever at'each side thereof, and amovable collar carried bysaid lever, whereby a continuous rotation ofthe intermediate gear in either direction can be caused by a vibrationof the operating lever, substantially as set forth.

2. In a ratchet device for tools, the combi-;

is v b ated, h term d a s a e ngbecon-i tinuouslyrotated in onedirectionor the other-,1 sub tan ially a set, f th- 3. ll-he(combination with shaft, a Pinion secured toone end thereof and a]ratchet .wheel secured to the other end, abevelfei pinion mountedloosely on the shaft and carrying a ratchet wheel, an intermediate bevelpinion adapted to mesh with the above mentioned pinions,a lever mountedon said shaft between the ratchet wheels, a .pair of spring actuateddogs, pivot-ally connected at each side oftsaid lever an d ,a collarhaving depending flanges, mounted loosely on said lever and adapted tomaintain one dog of each pair in engagement with the adjacent ratchetwheel, while the other dog of each pair is left free, whereby thedirection of the continuous rotation of the intermediate gear and thetool actuated thereby,-Jnay be changed at will, substantially as setforth.

In testimony whereof I have signed this specification in the-presence oftwoisubs cribins-witnesses- PAT-RISK ;J.-o-11s*aiE N.

Witnesses:

WIL AME- Veer, Joan OBn EN.

